CVE-2019-19791: In LemonLDAP::NG (aka lemonldap-ng) before 2.0.7, the default Apache HTTP Server configuration does not proper

Q: How do I fix CVE-2019-19791?

lemonldap\: upgrade to 2.0.7. Exact commands for each OS are on this page.

Q: Is CVE-2019-19791 being exploited?

CVE-2019-19791 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-19791 affect?

CVE-2019-19791 affects lemonldap\. Severity is critical (CVSS 9.8). In LemonLDAP::NG (aka lemonldap-ng) before 2.0.7, the default Apache HTTP Server configuration does not properly restrict access to SOAP/REST endpoints (when some LemonLDAP::NG setup options are used). For example, an attacker can insert in

Q: How urgent is CVE-2019-19791?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This month

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2019-19791 is a critical-severity flaw (CVSS 9.8) affecting lemonldap\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In LemonLDAP::NG (aka lemonldap-ng) before 2.0.7, the default Apache HTTP Server configuration does not properly restrict access to SOAP/REST endpoints (when some LemonLDAP::NG setup options are used). For example, an attacker can insert index.fcgi/index.fcgi into a URL to bypass a Require directive.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Published	2023-05-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: lemonldap-ng

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-29 19:15 UTCPublished CVE record published
2026-06-17 02:27 UTCUpdated Record last modified

lemonldap-ng lemonldap\ UPGRADE

Affected: < 2.0.7

Fixed in: 2.0.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy lemonldap || rpm -q lemonldap || lemonldap --version

2. UPGRADE to 2.0.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade lemonldap

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lemonldap

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-19791?

lemonldap\: upgrade to 2.0.7. Exact commands for each OS are on this page.

Is CVE-2019-19791 being exploited?

CVE-2019-19791 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-19791 affect?

CVE-2019-19791 affects lemonldap\. Severity is critical (CVSS 9.8). In LemonLDAP::NG (aka lemonldap-ng) before 2.0.7, the default Apache HTTP Server configuration does not properly restrict access to SOAP/REST endpoints (when some LemonLDAP::NG setup options are used). For example, an attacker can insert in

How urgent is CVE-2019-19791?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache HTTP Server vulnerabilities

Related CVEs

CVE-2024-48933 MEDIUM 6.1 UPGRADE A cross-site scripting (XSS) vulnerability in LemonLDAP::NG before 2.19.3 allows remote attackers to inject ar
CVE-2023-44469 MEDIUM 4.3 UPGRADE A Server-Side Request Forgery issue in the OpenID Connect Issuer in LemonLDAP::NG before 2.17.1 allows authent
CVE-2023-28862 CRITICAL 9.8 UPGRADE An issue was discovered in LemonLDAP::NG before 2.16.1
CVE-2022-37186 MEDIUM 5.9 UPGRADE In LemonLDAP::NG before 2.0.15

References

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